High Density Concrete Block

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High Density Concrete Block
Modular Vault Systems

 High Density Concrete Block


NELCO’s high density concrete block is designed for new construction or shielding upgrades for linear accelerators, H.D.R. rooms, and all therapeutic modalities requiring shielding materials. The block is manufactured in a standard size with three densities available to accommodate different physics requirements. For gamma radiation, higher density blocks (incorporating a larger concentration of steel aggregate) are more commonly utilized. For maximization of neutron shielding, lower density units are a viable solution.

H.D. block is manufactured in an “N” interlocking design. It can be utilized for maze walls, vault walls or vault ceilings, with or without mortar (for modularity), depending on physics requirements and construction design. Ceilings are generally supported by an independent steel support structure.

All NELCO H.D. concrete block is manufactured under strict NELCO quality guidelines.


Product High density concrete block
Design Interlocking modular units “N-Loc”
Usage Low & High Energy Linear Accelerator Vaults, Proton therapy, I.M.R.T., H.D.R., Gamma Knife, Cyber-Knife, Cobalt
Dimensions 6"H x 6"W x 12"D
Construction 145 lbs./cu. ft.; 240 lbs./cu. ft.; 288 lbs./cu.ft.
Weight 36/60/72 lbs.
Design criteria Optimal shielding design achieved with utilization of lowest-cost shielding material, or combination of materials maximizing available space allocation

Versatility can be used in new or upgrade vault construction
Interlocking “N” design assures shielding integrity
Space savings higher density block saves space over traditional concrete construction
Modularity dry joint design easily uninstalled for relocation
Fiscal considerations modular designs may be eligible for accelerated depreciation and after-tax savings


Copyright © 2004 JZ Imaging & Consulting
Last modified: 07/08/14